Why do elements within a group have similar chemical properties?

Elements in the same group have similar properties because they have the same number of valence electrons.

Explanation:

What are valence electrons?

Valence electrons are the electrons on the outermost shell. For example take the element carbon or it’s symbol C. It’s has 4 valence electrons.

How do you find valence electrons?

Several ways, but one way is to draw Lewis structures, also known as Lewis dot diagrams.

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linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.